1st question the height (h) in feet of a projectile launched vertically upward from the top of a 280-foot tall bridge is given by h= 280 + 48t - 16t^2 where t is time in seconds. when does the projectile reach a maximum height and how long will it take the projectile to strike the ground? second question chris want to make an enclosed rectangular area for a mulch pile. she wants to make the enclosure in such a way as to use a corner of her back yard. she also wants it to be twice as long as it is wide. since the yard is already fenced, she simply needs to construct two sides of the mulch pile enclosure. she has only 15 feet of material available. find the dimensions of the enclosure that will produce the maximum area.

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Mr vale buys 48 flowers. he puts bunches of 6 flowers each in vases. if he sells each vase for $2, how much dose he earn?

Two spray paint machines are used to paint different portions of a large wall. the first machine (nicknamed "paint pro") is used for two hours. the second machine (nicknamed "goldilocks") is used for an hour and a half. when they are working at the same time, they can paint 55 square feet per minute. together they painted 5850 square feet of wall. how many square feet of wall per minute can each machine paint? e used to paint different portions of a large wall. the first machine (nicknamed "paint pro") is used for two hours. the second machine (nicknamed "goldilocks") is used for an hour and a half. when they are working at the same time, they can paint 55 square feet per minute. together they painted 5850 square feet of wall. how many square feet of wall per minute can each machine paint?